Driving hub for pulleys or gears



Dec, 16,1941. M, LEAK I 2,266,499

, DRiVING HUB FOR PULLEYS OE GEARS Filed Ju1 29, 1939 Patented Dec. 16, 1941 v s PATENT OFFICE 1 DRIVING HUB FOR PULLEYS R GEARS James M. Leake', Toledo, Ohio, assignor to Toledo Stamping and Manufacturing Company, To-

ledo, Ohio, a corporation of Ohio I Application July 29, 1939, Serial No. 287,342

2 Claims.

My invention relates to driving hubs for pulleys or gears and particularly to the type provided with a keyway.

Heretofore gears and pulleys have been made from forgings and castings in which the hub is an integral part of the gear or pulley. A hole is drilled or reamed in the hub and then a groove or keyway is cut in the hub. In many cases the faces or outer ends of the hub must be smooth. In the past this has been accomplished by machining these ends. This method of making driving hubs for pulleys or gears requires much machining and also a considerable amount of material is wasted in this machining process, consequently the driving hubs used at the present time are expensive. My improved type of driving hub is composed of stampings that are fabricated into a unit and then fastened to a pulley or gear. No machining is required to make my improved type of driving hub. Since my improved type of hub consists of stampings it is possible to get the same strength with less weight than is possible in the type of hub used at the present time.

One object of my invention is to provide a driving hub that eliminates all expensive machining operations.

Another object of my invention is to provide a driving hub that is light in weight.

Another object of my invention is to provide a driving hub that readily adapts itself to quantity production.

Another object of my invention is to provide a driving hub for gears or pulleys that is simple, durable, strong and inexpensive.

With these and other objects in view, my invention consists in the construction, combination and arrangement of the various parts of my improved device as described in the specification, claimed in the claims, and illustrated in the accompanying drawing.

In the drawing:

Fig. 1 is a side view of a pulley embodying my invention.

Fig. 2 is a sectional view taken along line 2-2 of Fig. 1.

Fig.3 is a pictorial view of an assembled hub of my improved type.

Fig. 4 is a pictorial view of the bushing used in my improved type of driving hub.

Fig. 5 is a sectional view taken along line 55 of Fig. 2.

Referring to the drawing I have shown in Figures 1 and 2 a pulley composed of stampings 9 and Ill. The members 9 and Ill are provided with integral web members I l and I2. The driving hub is composed of a stamped member I4 and a stamped bushing l5. The entire pulley is assembled as shown in Fig. 2 and then is permanently assembled by means of the rivets ii).

The stamped hub member I4 has an annular ring portion l6. A cup is drawn from the annular ring portion l6 thus forming the annular flanged portion ll. The bottom of the cup is then parallel to the ring portion I6. A hole i8 is then pierced in the bottom of the cup portion of the member l4 so that the diameter of the hole l8 corresponds to the inside diameter of the bushing I5.

The bushing I5 does not form a complete cylinder. Its ends are a predetermined distance apart thus leaving an opening l9 in the cylinder as shown in Fig. 4. The faces forming the opening l9 are substantially parallel. The bushing I5 is inserted in the stamped hub member M as shown in Figs. 2 and 5. When the bushing I5 is inserted in the hub member [4 the opening I9 shown in Fig. 4 forms a keyway 20 as shown in Figs. 2, 3 and 5. The bushing I5 is fastened in the hub member M by means of copper-hydrogen brazing. The bushing l5 may also be welded to the web member 12 by means of a weld 2| if additional strength is required.

The bushing l5 and the annular flanged portion I! may be perfectly cylindrical or they may be substantially so as shown in the drawing in which case they are actually a frustum of a cone.

The outer end of the annular flanged portion I1 is provided with a ring portion 22 which is substantially at right angles to the annular portion I1. This ring portion 22 adds considerable strength to the hub particularly at the point where the keyway 20 is located.

My improved type of hub construction is adapted for use in connection with a shaft and key, where power is transmitted from a pulley to a shaft through the medium of a key or vice versa.

From the foregoing description it can be readily seen that my improved type of driving hub has many advantages over those used at the present time. Greater strength can be secured with less Weight because the metal used in stampings has greater strength per unit weight than does cast or forged metal. It also eliminates all machining which is a very expensive process.

It can readily be seen that several modifications of my invention can be made. In some cases it might be desirable to use a hub member I4 on both sides of the Web members H and I2.

In some cases it might be desirable to assemble the entire unit by copper hydrogen brazing and thus eliminate the rivets l3. It can also readily be seen that my type of hub could be used in connection with wheels or gears as well as with a pulley as shown in the drawing.

While I have described the details of one form of my invention it is to be understood that I am not to be limited to these details except by the scope of the appended claims.

Having thus described my invention what I claim is:

1. A stamped hub for a pulley or a gear comprising; an outer stamping, said outer stamping having an annular ring adapted to be fastened to a pulley or a gear, and an annular flange struck outwardly from said ring; an inner member comprising a slotted substantially cylindrical member; a means for fastening said slotted substantially cylindrical member in said outer stamping; and a keyway, said outer stamping forming the bottom wall of said keyway and said slotted cylindrical inner member forming the side walls of said keyway.

2. A stamped hub for a pulley or a gear comprising; a unitary outer stamping, said outer stamping having an annular ring adapted to be fastened to a pulley or gear, an annular flange struck outwardly from said ring and an annular ring extending inwardly at substantially right angles to said annular flange; an inner member comprising a slotted substantially cylindrical member; a means for fastening said inner member in said outer stamping; and a keyway, said unitary Gute'r stamping providing the bottom wall of said keyway and said inner member providing the side walls of said keyway.

JAMES M. LEAKE. 

